Résumé

The objective of this study was to evaluate the coagulation-flocculation process in
the clarification of leachate from the landfill Technical Center of Souk-Ahras city
using three coagulants based on iron: ferrous sulfate FeSO4.7H2O; ferrous chloride
FeCl2.4H2O and ferric chloride FeCl3. The influence of some parameters namely
pH leachate, dose and nature of coagulant and nature of flocculant was studied.
The best treatment efficiency was obtained at 20 % of FeCl3 giving a turbidity of
4.09 NTU with pH adjustment of the raw leachate at acidic pH (3.5 ± 0.2) before
coagulant addition and at a basic pH (7.5 ± 0.2) after addition of coagulant. The
iron valence and the nature of anion at which is linked, played a determinant role
in the clarification of leachate. The treatments made with ferric chloride in the
presence of a flocculant have proved that the starch was more efficient than lime
giving abatement rates of 99 % for COD and 85 % for BOD5.

Information

Item Type:	Journal
Divisions:	» laboratoire de Modélisation et Analyse Socio-Economique en Science de l’Eau » Faculté des Sciences et de la Technologie
ePrint ID:	2700
Date Deposited:	2021-08-29
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/2700

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